1. Why is diversity important in maintaining the stability of an ecosystem? 2. What is the broadest level of ecological classification within the biosphere?
What are the major abiotic factors used to characterize them?
3. What is the importance of plants in the ecosystem?

2. cheryl hears a new song on the radio every day during the week on her commute to work. surprisingly, when the song comes on at a party on saturday night, she knows most of the words without trying. describe the three ways that we use cognition to learn without reinforcement. which type of cognitive learning without reinforcement best explains how cheryl knew the song lyrics? explain your answer.